Very cool game, from the music choice to the theme to the look. A really well done and polished product. I almost got to the end, but there was one object remaining and I couldn't find it after a while.
My one complain would be the aiming mechanics. It's quite hard to aim properly at enemies while on the move. It'd have benefited from twin stick mechanics. Despite this, and because the game is easy (as it should be, as we control a monster), we can still do a good job killing everyone.
Overall, a very good submission. Congratulations, host! :)